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[Solved] ‘TypeError: is not a function’ in Node.js

Hello Guys, How are you all? Hope You all Are Fine. Today I get the following error ‘TypeError: is not a function’ in Node.js in javascript. So Here I am Explain to you all the possible solutions here.

Without wasting your time, Let’s start This Article to Solve This Error.

How ‘TypeError: is not a function’ in Node.js Error Occurs?

Today I get the following error ‘TypeError: is not a function’ in Node.js in javascript.

How To Solve ‘TypeError: is not a function’ in Node.js Error ?

  1. How To Solve 'TypeError: is not a function' in Node.js Error ?

    To Solve 'TypeError: is not a function' in Node.js Error If you need to expose a specific component, function or a variable to public. You have to exports those components using JavaScript modules.

  2. 'TypeError: is not a function' in Node.js

    To Solve 'TypeError: is not a function' in Node.js Error If you need to expose a specific component, function or a variable to public. You have to exports those components using JavaScript modules.

Solution 1

This happened to me many times because of circular dependency, check if you have 2 classes that are requiring each other, remove one of them from requiring the other and the issue should be solved

Solution 2

If you need to expose a specific component, function or a variable to public. You have to exports those components using JavaScript modules.

let add = (a,b)=>{
    return ( a+b);
}
module.exports.add=add;

or if you want to expose multiple functions, you can do as follows.

let add = (a,b)=>{
    return (a+b);
}
let subtract = (a, b)=>{
    return (a-b);
}
module.exports={
   add : add,
   subtract : subtract
};

Summery

It’s all About this issue. Hope all solution helped you a lot. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you? Thank You.

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